Faculty Directory

Chang, Gang-Len

Chang, Gang-Len

Professor and A. James Clark Chair
Director, Traffic Operatoins and Safety Laboratory
Manager. ATTAP Program
Civil and Environmental Engineering
3140 Jeong H. Kim Engineering Building


  • Ph.D., University of Texas at Austin, 1985
  • M.S., National Chiao Tung University, 1979
  • B.Eng., National Cheng Kung, 1975


  • Network traffic control
  • Freeway traffic management and operations
  • Real-time traffic simulation
  • Dynamic urban systems


Chang, Students Honored with Mickle Award

A UMD research team wins one of the transportation field’s most prestigious honors.

New Research Showcased at TRB

Transportation safety, impact of telecommuting among topics covered by UMD experts.

Data-Driven Research, Pandemic Impact Highlighted at TRB

UMD researchers presented new findings, tools, and technologies, including a COVID-19 Impact Dashboard that leverages mobile device data.

Smart signals, safer intersections

Gang-Len Chang and his research team are testing a way to reduce sudden braking.

UMD workshop examines risks related to new transportation technology

Key concerns include vehice safety, software reliabillity, and cybersecurity.

CEE Experts Active at TRB 97th Annual Meeting

Faculty, staff, and students gave more than 50 presentations during the four-day event.

Transportation Tech Transfer Touted

Clark School demonstrates impact of its transportation research for federal officials.

Chang Awarded $1 Million by MSHA

Grant will fund civil engineering research into designs for new unconventional intersections.

Chang Awarded $1.23M for Traffic System

Real-time traffic monitoring, prediction system for Ocean City garners state, federal funds.

DHS to Fund Chang I-495 Study

Traffic research nets $500,000 from Department of Homeland Security.

Clark School Research Predicts Drivers' Commutes

Real-time sensor network on I-70 to Baltimore helps state officials help commuters.